Photo gallery: Fatal West Side collision

Alyssa Pointer / Chicago Tribune

A Chicago police officer investigates the scene of a fatal car crash that involved an off-duty police officer and a female driver at the intersection of South Kostner Avenue and West Roosevelt Road, June 27, 2017, in the Lawndale neighborhood.

A Chicago police officer investigates the scene of a fatal car crash that involved an off-duty police officer and a female driver at the intersection of South Kostner Avenue and West Roosevelt Road, June 27, 2017, in the Lawndale neighborhood.

A wrecked car is extracted by a tow truck operator at the scene of a fatal car crash that involved an off-duty police officer at the intersection of South Kostner Avenue and West Roosevelt Road on June 27, 2017, in the Lawndale neighborhood. A woman and an off duty Chicago police officer were killed.

A wrecked car is extracted by a tow truck operator at the scene of a fatal car crash that involved an off-duty police officer at the intersection of South Kostner Avenue and West Roosevelt Road on June 27, 2017, in the Lawndale neighborhood. A woman and an off duty Chicago police officer were killed.